﻿// Copyright 2006 - Ricardo Stuven (rstuven@gmail.com)
//
// This file is part of MsSqlSpatial.
// MsSqlSpatial is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
// 
// MsSqlSpatial is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Lesser General Public License for more details.

// You should have received a copy of the GNU Lesser General Public License
// along with MsSqlSpatial; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 

using System;
using System.Data;
using System.Data.SqlClient;
using System.Data.SqlTypes;
using Microsoft.SqlServer.Server;
using MsSqlSpatial;
using GisSharpBlog.NetTopologySuite.Geometries;

using GeoAPI.Geometries;

public partial class UserDefinedFunctions
{
	/// <summary>  
	/// Returns this <c>Geometry</c>s bounding box. If this <c>Geometry</c>
	/// is the empty point, returns an empty <c>Point</c>. If the <c>Geometry</c>
	/// is a point, returns a non-empty <c>Point</c>. Otherwise, returns a
	/// <c>Polygon</c> whose points are (minx, miny), (maxx, miny), (maxx,
	/// maxy), (minx, maxy), (minx, miny).
	/// </summary>
	/// <param name="X1"></param>
	/// <param name="Y1"></param>
	/// <param name="X2"></param>
	/// <param name="Y2"></param>
	/// <param name="srid"></param>
	/// <returns>    
	/// An empty <c>Point</c> (for empty <c>Geometry</c>s), a
	/// <c>Point</c> (for <c>Point</c>s) or a <c>Polygon</c>
	/// (in all other cases).
	/// </returns>
	/// <remarks>
	/// </remarks>
	[SqlFunction(IsDeterministic = true)]
	public static SqlBytes MakeEnvelope(SqlDouble X1, SqlDouble Y1, SqlDouble X2, SqlDouble Y2, SqlInt32 srid)
	{
		IGeometry envelope = GeometryFactory.Default.ToGeometry(new Envelope(X1.Value, X2.Value, Y1.Value, Y2.Value));
		return ConvertGeometry.ToSqlBytes(envelope, srid.Value);
	}
};

